Wielki Bór (Polish pronunciation: [ˈvjɛlkʲi ˈbur]) is a settlement in the administrative district of Gmina Giby, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the borders with Belarus and Lithuania. It lies approximately 13 kilometres (8 mi) south of Sejny and 99 km (62 mi) north of the regional capital Białystok.